Locking device for a tent

ABSTRACT

A locking device for a tent comprises a pole  2 , a lock base  3  installed to allow hoisting/lowering of the pole, a lock hole  4  provided the pole, and a lock pin  5 , provided movably within the lock base in the longitudinal direction, thus enabling the lock pin to be in a locking position to allow it enter the lock hole, to be retracted to an unlocking position, to allow the lock pin to disengage from the lock hole. An elastic body  6  pushes the lock pin towards the locking position all the time. An operating lever  7  provided on the lock base can move the lock pin to an unlocking position; a coming-off prevention and holding means  8  allows the lock pin to be placed in a safety position for preventing accidental unlocking.

TECHNICAL FIELD

The present invention relates mainly to improvements in a locking device for a tent to be used between a pole and a beam and also between an outer pipe and an inner pipe which constitute a tent.

TECHNICAL BACKGROUND

Such a locking device to which the present invention is directed has been disclosed, for example, in the below-listed patent documents 1˜5.

Said locking device principally comprises a pole, a lock base installed hoisting/lowering-allowably relative to a pole, a lock hole provided on a pole, a lock pin provided movably to a lock base in the longitudinal direction, thus enabling it to make a locking position to allow it to enter the lock hole and also to make an unlocking position to allow it to move away from the lock hole, an elastic body to push a lock pin mounted on a lock base to a locking position all the time, and an operating lever provided slideably on a lock base to move a lock pin to an unlocking position

With such a device, a relative hoisting/lowering of a pole and a lock base is prevented when the lock hole and lock pin come to an agreement by a relative hoisting/lowering of a pole and a lock base being performed thus a lock pin entering the lock hole with the help of an elastic body to place it at an locking position.

From such a state, when an operating lever is slid against an elastic body, a lock pin moves away from a lock hole and is placed at an unlocking position thus a relative hoisting/lowering of a pole and a lock base being permitted.

-   -   Patent Document 1 Japanese Utility Model Registration No.         2504766     -   Patent Document 2 Japanese Unexamined Patent Application No.         8-9938     -   Patent Document 3 Japanese Unexamined Patent Application No.         10-88949     -   Patent Document 4 Japanese Utility Model Registration No.         3123507     -   Patent Document 5 Japanese Utility Model Registration No.         3133263

DISCLOSURE OF THE INVENTION Object of the Invention

However, with what disclosed previously, a relative hoisting/lowering of a pole and a lock base is allowed when an operating lever is wrongly manipulated, thus causing unexpected accidents and not being able to secure the safety of the device.

It is an object to provide a locking device for a tent with which disadvantages described above are overcome, that is, an relative hoisting/lowering of a pole and a lock base is not allowed when an operating lever is wrongly manipulated, thus unexpected accidents being not invited and enhancing the safety.

Means to Achieve the Object

A locking device for a tent in accordance with the present invention is characterized by fundamentally comprising a pole, a lock base installed hoisting/lowering-allowably relative to a pole, a lock hole provided on a pole, a lock pin provided movably to a lock base in the longitudinal direction, thus enabling it to make a locking position to allow it to enter the lock hole and also to make an unlocking position to allow it to move away from the lock hole, an elastic body to push a lock pin mounted on a lock base to a locking position all the time, an operating lever provided slideably on a lock base to move a lock pin to an unlocking position, and a coming-off prevention and holding means which allows a lock pin to be placed at a locking position for coming-off prevention and holding.

When a lock hole and a lock pin come to an agreement by means that a pole and a lock base are made a relative hoisting/lowering, a lock pin enters a lock hole with the help of an elastic body, thus it being placed at the locking position and a relative hoisting/lowering of a pole and a lock base being prevented.

When an operating lever is slid against an elastic body from such a state, a lock pin moves away from a lock hole, thus it being placed at the unlocking position and a relative hoisting/lowering of a pole and a lock base being allowed.

When a coming-off prevention and holding means is actuated, a lock pin is held at a locking position for the coming-off prevention. Therefore, even when an operating lever is wrongly manipulated so that a lock pin is placed at an unlocking position, a relative hoisting/lowering of a pole and a lock base is prevented due to the reason that the lock pin is held at a locking position for coming-off prevention with the help of a coming-off prevention and holding means.

A pole is provided with an inner pipe and an outer pipe into which the inner pipe is slideably inserted. A lock base is fixed to an outer pipe, and a lock hole is made on the inner pipe. It is desirable that a through hole through which a lock pin passes is provided on an outer pipe. In such a manner, a locking device can be mounted between the outer and inner pipes of the pole of a tent.

A coming-off prevention and holding means is installed between a lock base and a lock pin. It is desirable that the means is equipped with a lock pin provided movably in the longitudinal direction to a lock base and also pivotally about the axis in the longitudinal direction, a rotation operating body provided on a lock pin with which the operation of rotation becomes possible from outside, a rotation regulating mechanism provided between a lock pin and a lock base with which a lock pin can be placed either at a coming-off prevention capable position or a coming-off prevention incapable position by regulating the rotation of a lock pin, and a coming-off prevention mechanism provided between a lock pin and a lock base with which the movement of a lock pin in the longitudinal direction is prevented when the lock pin is placed at a coming-off prevention capable position and the movement of a lock pin in the longitudinal direction is allowed when the lock pin is placed at a coming-off prevention incapable position. In such a manner, it becomes possible that the simplified structure results in both cost and space savings with a coming-off prevention and holding means which can be constituted by making use of a lock pin.

A rotation regulating mechanism is provided with a near oval shaped brim piece mounted on a lock pin and a contacting piece installed on a lock base which makes a contact with the end surface of a brim piece when a lock pin is placed at a coming-off prevention capable position and a coming-off prevention incapable position, and it is desirable that a coming-off prevention mechanism is provided with a brim piece for a rotation regulating mechanism and a coming-off prevention piece mounted on a lock base which makes a contact with a brim piece when a lock pin is placed at the coming-off prevention capable position and makes no contact with a brim piece when a lock pin is placed at the coming-off prevention incapable position. In such a manner, it becomes possible that the simplified structure by the shared use of a brim piece results in both cost and space savings.

An outer pipe side sliding body which guides an inner pipe slideably is provided underneath the outer pipe, and an inner pipe side sliding body which guides an outer pipe sideably is provided above the inner pipe. It is desirable that a lock base is attached removably to the lower part of the outer pipe with the outer pipe side sliding body. In such a manner, a relative movement of the outer pipe and inner pipe can be achieved smoothly, thus preventing the rattle between the outer pipe and inner pipe and allowing to make use of the outer pipe side sliding body at the time of installing a lock base and an outer pipe.

EFFECTS OF THE INVENTION

With the present invention, such excellent effects as stated below can be achieved.

A locking device for a tent comprises a pole, a lock base, a lock hole, a lock pin, an elastic body, an operating lever, and a coming-off prevention and holding means. Among other things, the device is provided with a coming-off prevention means which allows a lock pin to be placed at a lock position for coming-off prevention and holding. Therefore, even when an operating lever is wrongly manipulated, unexpected accident can be avoided, thus enhancing the safety.

BEST MODE FOR CARRYING OUT THE INVENTION

A preferred embodiment of the present invention is described hereinafter with reference to the following drawings.

FIG. 1 is an exploded perspective view to illustrate a locking device for a test according to the present invention.

FIG. 2 is a longitudinal sectional side view to illustrate the state of coming-off prevention being released and locked.

FIG. 3 is a longitudinal sectional rear view of FIG. 2.

FIG. 4 is a longitudinal sectional front view to illustrate a fitting state of an outer pipe of a pole, a lock base and an outer pipe side sliding body.

FIG. 5 is a cross sectional top plan view to illustrate the fitting state of the outer and inner pipes of a pole.

FIG. 6 is the same view as FIG. 2 to illustrate the state of being unlocked.

FIG. 7 is the same view as FIG. 2 to illustrate the state of coming-off prevention being held and locked.

FIG. 8 is a longitudinal sectional rear view of FIG. 7.

Referring now to FIG. 1, it is so stipulated that an upper side is an upper side, a lower side is a lower side, a right upper side is a front side, a left lower side is a rear side, a right lower side is a right side, and a left upper side is a left side.

The major portion of a locking device for a tent 1 comprises a pole 2, a lock base 3, a lock hole 4, a lock pin 5, an elastic boy 6, an operating lever 7, and a coming-off prevention and holding means 8.

A pole 2 which constitutes the major portion of a locking device for a tent 1 is, with this example, made up of metals such as aluminum and the like with a long length in the vertical direction. The pole 2 is equipped with an outer pipe 9 and an inner pipe 10 which is slideably inserted therein.

An outer pipe 9 is shaped of nearly square cross section, and on the lower part there are made fitting holes 11 on the both left and right sides, and on the rear side there is made a through hole with communication to a lock hole 4.

An inner pipe 10 is shaped of nearly square cross section having a shorter diameter than that of an outer pipe 9. On the 4 inside corners thereof stiffening ribs 13 shaped of nearly square cross section are provided.

On the lower part of an outer pipe 9, there is installed an outer pipe side sliding body 14 to guide slideably an inner pipe 10 fitted thereto, and on the upper part of an inner pipe 10, there is installed an inner pipe side sliding body 15 to guide slideably an outer pipe 9 fitted thereto.

A synthetic resin made outer pipe side sliding body 14 is provided with a 4-frame shaped frame piece 16 which makes a contact with the lower end of the outer pipe 9, 4 sliding pieces 17 slideably contacted with the outer surface of an inner pipe 10 being made on each side thereof and positioning on the inner side of the lower part of an outer pipe 9, a projection 18 fitted to a fitting hole 11 of an outer pipe 9 outwardly protruded to both left and right sliding pieces 17, and a through hole 19 made on the rear side sliding piece and with communication to a through hole 12 of an outer pipe 9.

A synthetic resin made inner pipe side sliding body 15 comprises a cap 20 fitted to the upper end of an inner pipe 10, an inserting piece 21 made on the under side thereof and inserted into the upper inside of an inner pipe, and 8 sliding pieces 22 in total which are made on the 4 corners not to be interfered with 4 sliding pieces 17 and slideably contacting with the inner surface of an outer pipe 9.

A lock base 3 installed relative hoisting/lowering possibly to a pole 2 is, with this example, made of synthetic resin and fixed to an outer pipe 9, and provided with a square pipe shaped pipe 23 to be outwardly fitted to an outer pipe 9, a case 24 made on the rear side thereof and having a near circle shaped housing cavity with the open rear part, and a cap 25 to close the rear part thereof.

On the both left and right sides of a pipe 23 there is formed a fitting hole 26 for communication to a fitting hole 11 of an outer pipe 9 and to which a projection 18 of an outer pipe side sliding body 14 is fitted.

On a pipe 23 and a cap 25 there is formed a guide hole 27 to guide a lock pin 5 passing through them.

On the upper part of a case 24 for communication to a housing cavity there are formed left and right insertion holes wherein an operating lever 7 is to be inserted.

A cap 25 is removably secured by means of fastening hardware 29 such as a screw and the like. On the front side of a guide hole 27, there is formed a receiving hole 30 to support one side of an elastic body 6 having a larger diameter than that thereof, and on the rear surface, there are signs displayed, “ON” to show the state of coming-off prevention and holding, “OFF” to show the state of coming-off prevention released, and “Double-headed Allow” to indicate the direction of rotation.

A lock hole 4 installed on a pole 2 is, with this example, made on an inner pipe 10. The suitable number of lock holes is made in the longitudinal direction (up and down directions) on the rear side of an inner pipe 10 with a prescribed interval though only one hole is shown in the drawing.

A lock pin 5 installed movably to a longitudinal direction to a lock base 3 is able to take a locking position to enter a lock hole 4 and also to take an unlocking position to move away from a lock hole 4. With this example, a lock pin 5 is made of a metal such as aluminum and the like and shaped like a near circular cylinder. It is installed movably to the to-and-fro direction to the guide hole 27 of a lock base 3 and also installed pivotally to the to-and-fro direction about the axis.

On the front side of a lock pin 5, there is formed a recess wherein a synthetic resin made and cylinder shaped sliding piece is inserted except its front side. At the midpoint of a lock pin 5 there is formed an oval shaped brim piece 32, and on the rear part of a lock pin 5 there is formed a fitting piece 33 which both sides are cut off.

An elastic body 6 which is installed on a lock base 3 pushes a lock pin 5 to a locking position at all the time. With this example, a compression type coil spring made of a metal such as spring steel and the like is used. It is placed around a lock pin 5 from behind, and installed between a brim piece 32 of a lock pin 5 and a receiving hole 30 of a cap 25 of a lock base 3, thus a lock pin 5 being pushed to the front side (to the side of a lock hole 4) all the time.

An operating lever 7 which is slideably equipped with a lock base 3 to allow a lock pin 5 to be placed at an unlocking position is, with this example, provided with a bifurcated fork 34 made of a metal such as aluminum, a boss 35 formed by it being bent at the midpoint thereof, and a synthetic resin made and semicircular shaped operating piece 36 integrally made on the upper part of the fork 34.

The fork 34 and boss 35 of an operating lever 7 are inserted into an insertion hole 28 of a lock base 3. A tip of the fork 34 is positioned at the front side of a brim piece 32 over a lock pin 5, and a boss 35 is slideably fitted in the to-and-fro direction to a lock base 3 with a supporting axis 37 in the left and right directions.

A coming-off prevention and holding means 8, which allows a lock pin 5 to be placed at a locking position for coming-off prevention and holding and is installed, with this example, between a lock base 3 and a lock pin 5 is provided with a lock pin 5 movably installed in the longitudinal direction (to-and-fro direction) to a lock base 3 and pivotally installed in the longitudinal direction about the axis, a rotation operating body 38 installed on a lock pin 55 to make possible to operate it for rotation from outside, a rotation regulating mechanism 39 installed between a lock base 3 and a lock pin 5 to regulating rotation of a lock pin 5, thus allowing a lock pin 5 to be placed at a coming-off prevention capable position and a coming-off prevention incapable position, and a coming-off prevention mechanism 40 installed between a lock base 3 and a lock pin 5 to prevent a lock pin 5 to move in the longitudinal direction at the time when a lock pin 5 is at the coming-off prevention capable position, and a lock pin 5 to allow to move in the longitudinal direction at the time when a lock pin 5 is at the coming-off prevention incapable position.

A synthetic resin made and semicircle shaped rotation operating body 38 is provided with a receiving hole on the front side thereof, whereto a fitting piece 33 of a lock pin 5 is inserted and is removably secured by a fixture 41 such as a screw and the like

A rotation regulating mechanism 39 is provided with a brim piece 32 of a lock pin 5 and a contacting piece 42 provided inside the case 24 of a lock base 3, thus allowing it to be contacted with the end surface of the brim piece 32 at the time when a lock pin 5 is at the coming-off prevention capable position and coming-off prevention incapable position.

A prism shaped contacting piece 42 is formed on the lower left corner of the front side in the case 24 of a lock base 3.

A coming-off prevention mechanism 40 is provided with a brim piece 32 of a lock pin 5 and a coming-off prevention piece 43 installed on the lock base 3 which makes a contact with a brim piece 32 at the time when a lock pin 5 is at the coming-off prevention capable position and makes no contact with a brim piece 32 at the time when a lock pin 5 is at the coming-off prevention incapable position.

A plate shaped coming-off prevention piece 43 projects forward from front lower side of the cap 25 of a lock base 3.

As shown in FIG. 2, a rotation operating body 38 is so made that when it is in a horizontal state the brim piece 32 of a lock pin 5 comes to be a horizontal state, thus a lock pin 5 being placed at a coming-off prevention capable position by means of a rotation regulating mechanism 39, and then when it is rotated 90° clockwise as shown in FIG. 3 to be in a vertical state as shown in FIG. 7, the brim piece 32 of a lock pin 5 come to be in a vertical state, thus a lock pin 5 being placed at a coming-off prevention incapable position by means of a rotation regulating mechanism 39.

Next, functions are described based on such a constitution.

A locking device for a tent 1 is assembled in such a manner as described below.

A fork 34 and a boss 35 of an operating lever 7 are inserted into an insertion hole 28 of a lock base 3. The boss 35 is slideably fitted to a lock base 3 with a supporting axis 37. An elastic body 6 is inserted into a later half of a lock pin 5. After the rear side of a lock pin 5 is inserted into a guide hole 27 of a cap 25 of a lock base 3, a rotation operating body 38 is fitted to a fitting piece 33 of a lock pin 5 by means of a fixture 41. And, then a lock pin 5 is inserted into the case 24 of a lock base 3 so that it is inserted into a guide hole 27 of a pipe 23 of a lock base 3. A cap 25 of a lock base 3 is fixed to a case 24 by means of a fastener 29, thus a fork 34 of an operating lever 7 making a contact with the front side of a brim piece 32 in the state of crossing over the front side of a lock pin 5.

A locking device for a tent 1 assembled in such a manner is fitted to an outer pipe 9 of a pole 2 as below.

While a lock pin 5 is placed at an unlocking position by means that an operating lever 7 is slid to the front side, a pipe 23 of a lock base 3 is slipped over the lower part of an outer pipe 9 of a pole, and a fitting hole 11 of an outer pipe 9 and a fitting hole 26 of a lock base 3 and a through hole 12 of an outer pipe 9 and a guide hole 27 of a lock base 3 come to an agreement respectively. And, when a sliding piece 17 equipped with a projection 18 of an outer pipe side sliding body 14 is made narrow and inserted in the lower part of an outer pipe 9, a projection 18 of an outer pipe side sliding body 14 is fitted to a fitting hole 11 of an outer pipe 9 and a fitting hole 26 of a lock base 3 with an elastic restoring force. And a through hole 12 of an outer pipe 9 and a through hole 19 of an outer pipe side sliding body 14 come to an agreement, thus making it possible that a lock pin 5 is projected to the inside of an outer pipe side sliding body 14 by way of the through holes 12, 19.

An inner pipe side sliding body 15 is fitted by means of an inserting piece 21 being slipped onto the upper part of an inner pipe 10.

When a lock hole 4 and a lock pin 5 are made to come to an agreement by performing a relative hoisting/lowering of an inner pipe 10 of a pole 2 and a lock base 3, a relative hoisting/lowering an inner pipe 10 of a pole 2 and a lock base 3 is prevented due to the reason that a lock pin 5 is inserted into a lock hole 4 with the help of an elastic body 6 to be at a lock position. (see FIG. 2 and FIG. 3)

Even when a lock hole 4 and a lock pin 5 do not come to an agreement, a sliding piece 31 of a lock pin 5 makes a contact with the outer surface of an inner pipe 10, thus the inner pipe 10 not being damaged.

When an operating lever 7 is slid against an force of an elastic body 6 toward the front side from such a state, that is, when it is rotated clockwise about the supporting axis 37 as shown in FIG. 2, a lock pin 5 comes out of a lock hole 4, thus it being placed at an unlocking position, and an relative hoisting/lowering of an inner pipe 10 of a pole 2 and a lock base 3 being allowed. (see FIG. 6)

When a rotation operating body 38 of a coming-off prevention and holding means 8 is made to be in a horizontal state, a brim piece 32 of a lock pin becomes in a horizontal state, thus a lock pin 5 being placed at a coming-off prevention capable position by means of a rotation regulating mechanism 39. Then, when an operating lever 7 is manipulated, a lock pin 5 is placed at an unlocking position. (see FIG. 2 and FIG. 3)

When a rotation operating body 38 of a coming-off prevention and holding means 8 is made to be at a vertical position by rotating it by 90° from the position in a horizontal state, a lock pin 5 is placed at a coming-off prevention incapable position by means of a rotation regulating mechanism 39 because a brim piece 32 of a lock pin 5 becomes a vertical state. Then, even when an operating lever 7 is manipulated, a lock pin 5 is held at a locking position. (see FIG. 7 and FIG. 8)

Having equipped with a coming-off prevention ad holding means 8, even when a lock pin 5 is forced to be placed at the unlocking position by the wrong manipulation of an operating lever, a relative hoisting/lowering of an inner pipe 10 of a pole 2 and a lock base 3 is prevented due to the reason that a lock pin 5 is held at a locking position for coming-off prevention and holding by means of a coming-off prevention and holding means 8.

A coming-off prevention and holding means 8 for which a lock pin 5 is used makes its structure simplified so that cost reduction and space saving can be achieved.

A brim piece 32 of a lock pin 55 has extremely rational roles, one to transmit an operating force of an operating lever 7 to a lock pin 5 and the other to receive the one side of an elastic body and another to function of constituting some parts of a rotation regulating mechanism 39 and a coming-off prevention mechanism 40 of a coming-off prevention and holding means respectively.

It is also extremely rational that a lock base 3 is removably fitted to an outer pipe 9 of a pole 2 by making use of an outer pipe side sliding body 14.

With a previous example, a lock base 3 is fixed to an outer pipe 9, a lock hole 4 is installed on an inner pipe 10, and a through hole 12 through which a lock pin 5 passes is made on an outer pipe 9. However, it is possible that, for example, a lock base 3 is hoisting/lowering-possibly fitted to an outer pipe 9, and a lock hole 4 is installed on the outer pipe 9. In such a manner, it becomes possible that a beam member for a tent (not illustrated) is fixed to a lock base 3 and a locking device 1 is installed between a pole and a beam member.

With a previous example, a coil spring is employed. However, there is no need to say that, for example, a coil spring can be replaced by a flat board spring, a rubber or the like.

With a previous example, a coming-off prevention and holding means is installed between a lock base 3 and a lock pin 5. However, it is also possible that, for example, it is installed between a lock base 3 and an operating lever 7.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1. Exploded perspective view to show a locking device for a tent in accordance with the present invention

FIG. 2. Longitudinal side view to show a coming-off prevention released and locked state

FIG. 3 Longitudinal rear view of FIG. 2

FIG. 4 Longitudinal front view to show the fitting state of an outer pipe of a pole, a lock base and an outer pipe side sliding body

FIG. 5 Cross sectional plan view to show the fitting state of an outer pipe and inner pipe of a pole

FIG. 6 Same view as that of FIG. 2 to show an unlocking state

FIG. 7 Same view as that of FIG. 2 to show the coming-off prevention held and locked state

FIG. 8 Longitudinal rear view of FIG. 7

REFERENCE NUMERALS

-   -   1 A locking device for a tent     -   A pole     -   A lock base     -   A lock hole     -   A lock pin     -   6 An elastic body     -   7 An operating lever     -   8 A coming-off prevention and holding means     -   9 An outer pipe     -   10 An inner pipe     -   11 A fitting hole     -   12 A through hole     -   13 A stiffening rib     -   14 An outer pipe side sliding body     -   15 An inner pipe side sliding body     -   16 A frame piece     -   17 A sliding piece     -   18 A projection     -   19 A through hole     -   20 A cap piece     -   21 An inserting piece     -   22 An sliding piece     -   23 A pipe     -   24 A case     -   25 A cap     -   26 A fitting hole     -   27 A guide hole     -   28 An insertion hole     -   29 Fastening hardware     -   30 A receiving hole     -   31 A sliding piece     -   32 A brim piece     -   33 A fitting piece     -   34 A fork     -   35 A boss     -   36 An operating piece     -   37 A supporting axis     -   38 A rotation operating body     -   39 A rotation regulating mechanism     -   40 A coming-off prevention mechanism     -   41 A fixture     -   42 A contacting piece     -   43 A coming-off prevention piece 

1. A locking device for a tent comprising a pole having a lock hole; a lock base installed to be moveable upward and downward relative to the pole; a lock pin, provided to be movable relative to the lock base in a longitudinal direction, thus enabling the lock pin to move from a locking position in which the lock pin enters the lock hole to an unlocking position in which the lock pin is disposed away from the lock hole; an elastic body adapted to push the lock pin mounted on the lock base towards the locking position all the time, an operating lever rotatably mounted on the lock base and adapted to move the lock pin to the unlocking position; and a coming-off prevention and holding means adapted to place the lock pin in a locked safety position, whereby direct transition from the locked safety position to the unlocking position is prevented.
 2. The locking device for a tent as claimed in claim 1: wherein the pole comprises an outer pipe and an inner pipe to be fitted therein; wherein the lock base is fixed to the outer pipe; wherein the lock hole exists in the inner pipe; and wherein the outer pipe has a through hole through which the lock pin passes.
 3. The locking device for a tent as claimed in claim 1, wherein the coming-off prevention and holding means is installed between the lock base and the lock pin, and wherein the lock pin provided movably in the longitudinal direction to the lock base is also pivotally movable about an axis of the longitudinal direction, further comprising: a rotation operating body provided on the lock pin, with which an operation of rotation becomes possible from outside; a rotation regulating mechanism provided between the lock pin and the lock base, with which the lock pin can be placed either in the locked safety position or in an operational orientation by regulating the rotation of the lock pin; and a coming-off prevention mechanism provided between the lock pin and the lock base which prevents the lock pin from moving in the longitudinal direction when the lock pin is in the locked safety position but, also allows the lock pin to move in the longitudinal direction when the lock pin is in the operational orientation.
 4. The locking device for a tent as claimed in claim 3, wherein the rotation regulating mechanism comprises an oval shaped brim piece disposed on the lock pin, and a rotational stop disposed on the lock base which makes contact with an end surface of the brim piece when the lock pin is in the locked safety position and when the lock pin is in the operational orientation; and wherein the coming-off prevention mechanism includes the brim piece of the rotation regulating mechanism and a coming-off prevention piece mounted on the lock base which allows the lock pin to engage the coming-off prevention piece with the brim piece when the lock pin is in the locked safety position and prevents the lock pin from engaging the coming-off prevention piece with the brim piece when the lock pin is in the operational orientation.
 5. The locking device for a tent as claimed in claim 2, wherein an outer pipe side sliding body to slideably guide the inner pipe is provided on the lower part of the outer pipe, and wherein the lock base is removably fitted on the lower part of the outer pipe by means of the outer pipe side sliding body. 